If you have a 06/07 WRX with a vf turbo and STi TMIC you should have the splitter to seal the hood vent to the TMIC
I have the splitter but doesn't have the rubber shroud. You can get one for 30$ sold separately.
Price $50, I will ship but you pay shipping. I can send pics, will upload soon. I think these go for $100 or more new.